Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
72923779Factored
FactorDigitsBitsDate
400503848905124474803796222919726892137121.62015-09-16 08:19:43
P-1 factors
DateFactorB1B2
2015-09-16400503848905124474803796222919726892162500012500000
History
DateUserTypeResult
2015-09-16James HeinrichF-PM1
Factor: 4005038489051244748037962229197268921 / (P-1, B1=625000, B2=12500000, E=6)
2015-09-05gcardonaNF
no factor from 2^74 to 2^75
2015-09-03GregNF
no factor from 2^73 to 2^74
2015-09-03GregNF
no factor from 2^72 to 2^73
2015-03-27el groccoNF
no factor from 2^71 to 2^72
2013-08-21processinfoNF
no factor from 2^70 to 2^71
2013-04-18SMoffatNF
no factor from 2^69 to 2^70
2010-09-30ManuelJCNF
no factor from 2^68 to 2^69
2010-09-28GrunwalderGIMPNF
no factor from 2^67 to 2^68
2010-09-27GrunwalderGIMPNF
no factor from 2^66 to 2^67
2010-07-27GBY30701555NF
no factor from 2^65 to 2^66
2010-05-24S00030NF
no factor from 2^64 to 2^65
2008-09-19Wojciech FlorekNF
no factor to 2^64